gistfile1.java

import java.io.*;
import javax.crypto.*;
import java.util.*;
import javax.crypto.spec.*;
import java.net.*;

public class decrypt {
    static String DESpassword = "passwordfile";
    static byte[] salt = { 12, -99, 74, -28, 30, -125, 21, -4 };
    public static void main(String[] args) {
        try {
            File lastLogin = new File(args[0]);
            PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 5);
            SecretKey pbeKey = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(new PBEKeySpec(DESpassword.toCharArray()));
            Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
            cipher.init(2, pbeKey, pbeParamSpec);
            DataInputStream dis = new DataInputStream(new CipherInputStream(new FileInputStream(lastLogin), cipher));
            String username = dis.readUTF();
            String password = dis.readUTF();
            dis.close();
            System.out.println(username + ", " + password);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}